Here are 2 young girls, a Gir ( Bos Indicus on left) and a Normande (Bos taurus on right). Both Breeds have their advantages and disadvantages. Differences within the breeds are many as well, Brahma is beef and Gir is Milk, Holstein or Simental
As a rule, Bos Indicus, Cebú in Spanish, are less docile, are very attached to their offspring, usually need their calf at their feet to allow to milk and give milk for a very short time after being re-bred (90-100days) They are very hardy and have high resistance to heat, ticks, low maintenance overall.
Bos Taurus, are the European breeds and very docile. Give much more milk and don't give a hoot about their offspring, we raise our calves on a separate farm. Fickle as to feed, get infested with ticks if not cared for and don't like mud at all. in the tropics, hoof care is a constant problem. Persistence in milk is 300-400 days and most require to be forcibly dried before freshening.
Mixing the 2 is what most tropical farmers do. As in the Simbra mentioned. Depending on the specifics of the micro-climate, Coffee Land is far different than beachside, different mixes work best. 50%/50% where it is hotter, 25%Cebú/75% European at cooler high altitude.
Our location here is 1000 meters ASL and allot further from the equator than Costa Rica. (17ºS) We have about half of our herd purebred holstein, a dozen pure Normandes and the rest is mix of gir with both normande and holstein. The Holsteins give the most milk by far. The mix give less maintenance. We have a few Pardo Swissas as well and they are the same as the Holsteins.
I've had lots of fun at my attempt at the perfect mix.